Python Topology.open方法代碼示例

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
    def test_discover_set_name_from_primary(self):
        # Discovering a replica set without the setName supplied by the user
        # is not yet supported by MongoClient, but Topology can do it.
        topology_settings = SetNameDiscoverySettings(
            seeds=[address],
            pool_class=MockPool,
            monitor_class=MockMonitor)

        t = Topology(topology_settings)
        self.assertEqual(t.description.replica_set_name, None)
        self.assertEqual(t.description.topology_type,
                         TOPOLOGY_TYPE.ReplicaSetNoPrimary)
        t.open()
        got_ismaster(t, address, {
            'ok': 1,
            'ismaster': True,
            'setName': 'rs',
            'hosts': ['a']})

        self.assertEqual(t.description.replica_set_name, 'rs')
        self.assertEqual(t.description.topology_type,
                         TOPOLOGY_TYPE.ReplicaSetWithPrimary)

        # Another response from the primary. Tests the code that processes
        # primary response when topology type is already ReplicaSetWithPrimary.
        got_ismaster(t, address, {
            'ok': 1,
            'ismaster': True,
            'setName': 'rs',
            'hosts': ['a']})

        # No change.
        self.assertEqual(t.description.replica_set_name, 'rs')
        self.assertEqual(t.description.topology_type,
                         TOPOLOGY_TYPE.ReplicaSetWithPrimary)

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
def create_mock_topology(
        seeds=None,
        replica_set_name=None,
        monitor_class=MockMonitor):
    partitioned_seeds = list(imap(common.partition_node, seeds or ['a']))
    topology_settings = TopologySettings(
        partitioned_seeds,
        replica_set_name=replica_set_name,
        pool_class=MockPool,
        monitor_class=monitor_class)

    t = Topology(topology_settings)
    t.open()
    return t

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
def create_mock_topology(uri, monitor_class=MockMonitor):
    # Some tests in the spec include URIs like mongodb://A/?connect=direct,
    # but PyMongo considers any single-seed URI with no setName to be "direct".
    parsed_uri = parse_uri(uri.replace('connect=direct', ''))
    replica_set_name = None
    if 'replicaset' in parsed_uri['options']:
        replica_set_name = parsed_uri['options']['replicaset']

    topology_settings = TopologySettings(
        parsed_uri['nodelist'],
        replica_set_name=replica_set_name,
        pool_class=MockPool,
        monitor_class=monitor_class)

    c = Topology(topology_settings)
    c.open()
    return c

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
    def test_latency_threshold_application(self):
        selector = SelectionStoreSelector()

        scenario_def = {
            'topology_description': {
                'type': 'ReplicaSetWithPrimary', 'servers': [
                    {'address': 'b:27017',
                     'avg_rtt_ms': 10000,
                     'type': 'RSSecondary',
                     'tag': {}},
                    {'address': 'c:27017',
                     'avg_rtt_ms': 20000,
                     'type': 'RSSecondary',
                     'tag': {}},
                    {'address': 'a:27017',
                     'avg_rtt_ms': 30000,
                     'type': 'RSPrimary',
                     'tag': {}},
                ]}}

        # Create & populate Topology such that all but one server is too slow.
        rtt_times = [srv['avg_rtt_ms'] for srv in
                     scenario_def['topology_description']['servers']]
        min_rtt_idx = rtt_times.index(min(rtt_times))
        seeds, hosts = get_addresses(
            scenario_def["topology_description"]["servers"])
        settings = get_topology_settings_dict(
            heartbeat_frequency=1, local_threshold_ms=1, seeds=seeds,
            server_selector=selector)
        topology = Topology(TopologySettings(**settings))
        topology.open()
        for server in scenario_def['topology_description']['servers']:
            server_description = make_server_description(server, hosts)
            topology.on_change(server_description)

        # Invoke server selection and assert no filtering based on latency
        # prior to custom server selection logic kicking in.
        server = topology.select_server(ReadPreference.NEAREST)
        self.assertEqual(
            len(selector.selection),
            len(topology.description.server_descriptions()))

        # Ensure proper filtering based on latency after custom selection.
        self.assertEqual(
            server.description.address, seeds[min_rtt_idx])

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
    def test_timeout_configuration(self):
        pool_options = PoolOptions(connect_timeout=1, socket_timeout=2)
        topology_settings = TopologySettings(pool_options=pool_options)
        t = Topology(topology_settings=topology_settings)
        t.open()

        # Get the default server.
        server = t.get_server_by_address(('localhost', 27017))

        # The pool for application operations obeys our settings.
        self.assertEqual(1, server._pool.opts.connect_timeout)
        self.assertEqual(2, server._pool.opts.socket_timeout)

        # The pool for monitoring operations uses our connect_timeout as both
        # its connect_timeout and its socket_timeout.
        monitor = server._monitor
        self.assertEqual(1, monitor._pool.opts.connect_timeout)
        self.assertEqual(1, monitor._pool.opts.socket_timeout)

        # The monitor, not its pool, is responsible for calling ismaster.
        self.assertFalse(monitor._pool.handshake)

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
    def test_server_selector_bypassed(self):
        selector = CallCountSelector()

        scenario_def = {
            'topology_description': {
                'type': 'ReplicaSetNoPrimary', 'servers': [
                    {'address': 'b:27017',
                     'avg_rtt_ms': 10000,
                     'type': 'RSSecondary',
                     'tag': {}},
                    {'address': 'c:27017',
                     'avg_rtt_ms': 20000,
                     'type': 'RSSecondary',
                     'tag': {}},
                    {'address': 'a:27017',
                     'avg_rtt_ms': 30000,
                     'type': 'RSSecondary',
                     'tag': {}},
                ]}}

        # Create & populate Topology such that no server is writeable.
        seeds, hosts = get_addresses(
            scenario_def["topology_description"]["servers"])
        settings = get_topology_settings_dict(
            heartbeat_frequency=1, local_threshold_ms=1, seeds=seeds,
            server_selector=selector)
        topology = Topology(TopologySettings(**settings))
        topology.open()
        for server in scenario_def['topology_description']['servers']:
            server_description = make_server_description(server, hosts)
            topology.on_change(server_description)

        # Invoke server selection and assert no calls to our custom selector.
        with self.assertRaisesRegex(
            ServerSelectionTimeoutError, 'No primary available for writes'):
            topology.select_server(
                writable_server_selector, server_selection_timeout=0.1)
        self.assertEqual(selector.call_count, 0)

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
    def test_discover_set_name_from_secondary(self):
        # Discovering a replica set without the setName supplied by the user
        # is not yet supported by MongoClient, but Topology can do it.
        topology_settings = SetNameDiscoverySettings(
            seeds=[address],
            pool_class=MockPool,
            monitor_class=MockMonitor)

        t = Topology(topology_settings)
        self.assertEqual(t.description.replica_set_name, None)
        self.assertEqual(t.description.topology_type,
                         TOPOLOGY_TYPE.ReplicaSetNoPrimary)
        t.open()
        got_ismaster(t, address, {
            'ok': 1,
            'ismaster': False,
            'secondary': True,
            'setName': 'rs',
            'hosts': ['a']})

        self.assertEqual(t.description.replica_set_name, 'rs')
        self.assertEqual(t.description.topology_type,
                         TOPOLOGY_TYPE.ReplicaSetNoPrimary)

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
class MongoClient(common.BaseObject):
    HOST = "localhost"
    PORT = 27017

    def __init__(
            self,
            host=None,
            port=None,
            document_class=dict,
            tz_aware=False,
            connect=True,
            **kwargs):
        """Client for a MongoDB instance, a replica set, or a set of mongoses.

        The client object is thread-safe and has connection-pooling built in.
        If an operation fails because of a network error,
        :class:`~pymongo.errors.ConnectionFailure` is raised and the client
        reconnects in the background. Application code should handle this
        exception (recognizing that the operation failed) and then continue to
        execute.

        The `host` parameter can be a full `mongodb URI
        <http://dochub.mongodb.org/core/connections>`_, in addition to
        a simple hostname. It can also be a list of hostnames or
        URIs. Any port specified in the host string(s) will override
        the `port` parameter. If multiple mongodb URIs containing
        database or auth information are passed, the last database,
        username, and password present will be used.  For username and
        passwords reserved characters like ':', '/', '+' and '@' must be
        escaped following RFC 2396.

        :Parameters:
          - `host` (optional): hostname or IP address of the
            instance to connect to, or a mongodb URI, or a list of
            hostnames / mongodb URIs. If `host` is an IPv6 literal
            it must be enclosed in '[' and ']' characters following
            the RFC2732 URL syntax (e.g. '[::1]' for localhost)
          - `port` (optional): port number on which to connect
          - `document_class` (optional): default class to use for
            documents returned from queries on this client
          - `tz_aware` (optional): if ``True``,
            :class:`~datetime.datetime` instances returned as values
            in a document by this :class:`MongoClient` will be timezone
            aware (otherwise they will be naive)
          - `connect` (optional): if ``True`` (the default), immediately
            begin connecting to MongoDB in the background. Otherwise connect
            on the first operation.

          | **Other optional parameters can be passed as keyword arguments:**

          - `maxPoolSize` (optional): The maximum number of connections
            that the pool will open simultaneously. If this is set, operations
            will block if there are `maxPoolSize` outstanding connections
            from the pool. Defaults to 100. Cannot be 0.
          - `socketTimeoutMS`: (integer or None) Controls how long (in
            milliseconds) the driver will wait for a response after sending an
            ordinary (non-monitoring) database operation before concluding that
            a network error has occurred. Defaults to ``None`` (no timeout).
          - `connectTimeoutMS`: (integer or None) Controls how long (in
            milliseconds) the driver will wait during server monitoring when
            connecting a new socket to a server before concluding the server
            is unavailable. Defaults to ``20000`` (20 seconds).
          - `serverSelectionTimeoutMS`: (integer) Controls how long (in
            milliseconds) the driver will wait to find an available,
            appropriate server to carry out a database operation; while it is
            waiting, multiple server monitoring operations may be carried out,
            each controlled by `connectTimeoutMS`. Defaults to ``30000`` (30
            seconds).
          - `waitQueueTimeoutMS`: (integer or None) How long (in milliseconds)
            a thread will wait for a socket from the pool if the pool has no
            free sockets. Defaults to ``None`` (no timeout).
          - `waitQueueMultiple`: (integer or None) Multiplied by maxPoolSize
            to give the number of threads allowed to wait for a socket at one
            time. Defaults to ``None`` (no limit).
          - `socketKeepAlive`: (boolean) Whether to send periodic keep-alive
            packets on connected sockets. Defaults to ``False`` (do not send
            keep-alive packets).

          | **Write Concern options:**
          | (Only set if passed. No default values.)

          - `w`: (integer or string) If this is a replica set, write operations
            will block until they have been replicated to the specified number
            or tagged set of servers. `w=<int>` always includes the replica set
            primary (e.g. w=3 means write to the primary and wait until
            replicated to **two** secondaries). Passing w=0 **disables write
            acknowledgement** and all other write concern options.
          - `wtimeout`: (integer) Used in conjunction with `w`. Specify a value
            in milliseconds to control how long to wait for write propagation
            to complete. If replication does not complete in the given
            timeframe, a timeout exception is raised.
          - `j`: If ``True`` block until write operations have been committed
            to the journal. Cannot be used in combination with `fsync`. Prior
            to MongoDB 2.6 this option was ignored if the server was running
            without journaling. Starting with MongoDB 2.6 write operations will
            fail with an exception if this option is used when the server is
            running without journaling.
          - `fsync`: If ``True`` and the server is running without journaling,
            blocks until the server has synced all data files to disk. If the
            server is running with journaling, this acts the same as the `j`
#.........這裏部分代碼省略.........

# 需要導入模塊: from pymongo.topology import Topology [as 別名]
# 或者: from pymongo.topology.Topology import open [as 別名]
    def run_scenario(self):
        # Initialize topologies.
        if 'heartbeatFrequencyMS' in scenario_def:
            frequency = int(scenario_def['heartbeatFrequencyMS']) / 1000.0
        else:
            frequency = HEARTBEAT_FREQUENCY

        seeds, hosts = get_addresses(
            scenario_def['topology_description']['servers'])

        settings = get_topology_settings_dict(
            heartbeat_frequency=frequency,
            seeds=seeds
        )

        # "Eligible servers" is defined in the server selection spec as
        # the set of servers matching both the ReadPreference's mode
        # and tag sets.
        top_latency = Topology(TopologySettings(**settings))
        top_latency.open()

        # "In latency window" is defined in the server selection
        # spec as the subset of suitable_servers that falls within the
        # allowable latency window.
        settings['local_threshold_ms'] = 1000000
        top_suitable = Topology(TopologySettings(**settings))
        top_suitable.open()

        # Update topologies with server descriptions.
        for server in scenario_def['topology_description']['servers']:
            server_description = make_server_description(server, hosts)
            top_suitable.on_change(server_description)
            top_latency.on_change(server_description)

        # Create server selector.
        if scenario_def.get("operation") == "write":
            pref = writable_server_selector
        else:
            # Make first letter lowercase to match read_pref's modes.
            pref_def = scenario_def['read_preference']
            if scenario_def.get('error'):
                with self.assertRaises((ConfigurationError, ValueError)):
                    # Error can be raised when making Read Pref or selecting.
                    pref = parse_read_preference(pref_def)
                    top_latency.select_server(pref)
                return

            pref = parse_read_preference(pref_def)

        # Select servers.
        if not scenario_def.get('suitable_servers'):
            with self.assertRaises(AutoReconnect):
                top_suitable.select_server(pref, server_selection_timeout=0)

            return

        if not scenario_def['in_latency_window']:
            with self.assertRaises(AutoReconnect):
                top_latency.select_server(pref, server_selection_timeout=0)

            return

        actual_suitable_s = top_suitable.select_servers(
            pref, server_selection_timeout=0)
        actual_latency_s = top_latency.select_servers(
            pref, server_selection_timeout=0)

        expected_suitable_servers = {}
        for server in scenario_def['suitable_servers']:
            server_description = make_server_description(server, hosts)
            expected_suitable_servers[server['address']] = server_description

        actual_suitable_servers = {}
        for s in actual_suitable_s:
            actual_suitable_servers["%s:%d" % (s.description.address[0],
                                    s.description.address[1])] = s.description

        self.assertEqual(len(actual_suitable_servers),
                         len(expected_suitable_servers))
        for k, actual in actual_suitable_servers.items():
            expected = expected_suitable_servers[k]
            self.assertEqual(expected.address, actual.address)
            self.assertEqual(expected.server_type, actual.server_type)
            self.assertEqual(expected.round_trip_time, actual.round_trip_time)
            self.assertEqual(expected.tags, actual.tags)
            self.assertEqual(expected.all_hosts, actual.all_hosts)

        expected_latency_servers = {}
        for server in scenario_def['in_latency_window']:
            server_description = make_server_description(server, hosts)
            expected_latency_servers[server['address']] = server_description

        actual_latency_servers = {}
        for s in actual_latency_s:
            actual_latency_servers["%s:%d" %
                                   (s.description.address[0],
                                    s.description.address[1])] = s.description

        self.assertEqual(len(actual_latency_servers),
                         len(expected_latency_servers))
#.........這裏部分代碼省略.........